Hydraulic spring and shock absorbing device



Aug. 23, 1932. l EQ J. FISCHER g 1,872,919

HYDRAULIC SPRING AND SHOCK ABSORBING DEVICE Filed Julyv 26, 1928 Il:illlllllll Its-15m? y,

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' .HTTORNEY par 50 I also provide small bi-passes 18 in the pis-v Patented Aug. 23, 1931?l 'starts PATENT EDWARD J. risormn, or coVING'. roN, K1\I'rCKY, AssIGNon 0F oNEf-rI-Lniro u lraining A. .AMAN

.HYDRALIC senr-NG AND simon" ABsOR'BING .DEVICE Appnoatioii't1ea*Ji11yf26,j19st. serial 1295570.

' I have invented a new spring and shock absorbing device for automobiles andinotor driven vehicles, which devioeis simple ,in construction and eliminates springs, which Aare subject to breakage, and combinesa very effi# cient shock absorber and resilient riding oprah` ities Without the'use of flat springs. The device operates equally Wellin summer or Winter as the liquid usedtherein'isnon-freezing- G It also providesa means Aofsidelaction 'Witli' out strain on any. of its parts, by reason of the mounting on the ,machine which is accontplished by the gears 23 engaging "on the bracket24. p l j p 5 The device can be attaobedto any make oi' automobile, either at the chassis and aile as shown or to the frame ofthe automobile ask some makes of cars have. In the accompanying drawing forming 0 part of the specification:

Fig. 1 is a side view of the device shown in position, of an angle of the automobile,

Fig. 2 is a plan view With the levers broken oii, V 5 F ig. 3 is a section taken on line 3, 3 of the part shown in Fig. 2, and

F ig. 4 is a section taken on line 4, 4 of the parts shown in F ig. 3.

The device is formed of a cylinder 1, having the sides 2, Which are secured to the cylinder 1. Inside the cylinder 1 I provide pistons or plungers 3, which are of the opposed type. Pistons 3 are provided With necks 4 through Which I place pins 5. Engaging on these pins, I have the arms 6, having bifurcated ends 7, said bifurcated ends having slots 8 Which engage the pins 5. VAt the opposite ends of the lever 6, I securely mount the pins 9 at their centers. At the ends of the pins 9, I securely mount the ends 10 of the long levers 12. The opposite ends of the f lever 12 being pivotally mounted in the bearings 13 of the chassis 14. Fastened to the in- Y ner surfaces of the pistons 3 I have the fibre Washers 15. These Washers are to prevent Wear on the spring 16 and also to eliminate noise. In the pistons 3 I provide ball valves 16a at the outer ends of the pistons and ball valves 17 at the inner ends of the piston.

tons 3. VAbovethe,cylinder l, I rovide oil ohainbersld, said oil chambers eing pro'- vided with bi-'passes 20. Needlevalve's 21 are located in the oil chambers 19 and are to ad; just the openings 22 which form bi-pas'ses into the-oil chambers 19. At'the lower part 01"' the Cylinder 1, I provide 'ears 23 between which -braelret 24V engages on the pinsl Q5. This bracket, iii turn, is secured to the 'aXle 26I of the automobile. It Will be seen that this construction will allow`l a side motion to the automobile when one side or one Wheel passes 'over an obstruction. This method will also prevent any forward' orlreartv'ard action at the Wheel 27 When said Wheel-is passing over an obstruction, and the large extending-arms' 12 provide a neans of up and down-motion as the Wheels pass over the ob: struction. At the upper-part oi theoil chainberflQ 1 provide 4a pair of ears 28 which are similarl-in design as the ears 23. "These are for the purpose oli' 'securing the device to the automobile When they anglebar is above .as in some makes of automobiles. I

The devioeis operated rin thefiollowing manner As the wheel 27 passes over an obY` v struction, said Wheell bears upwardly on the arms*12,vvhich causes-the pistons 31to travel inwardly lor against themselves, and spring i6? yforming an equalizer, returns pistons 3 bark to normal when the obstruotion'is passed over.` As the pistons 3 travel v-tcnvard them! selves or inwardly, the liquid is forced quielrly through the valves iti-and avery slowre-V f turning action isperinittedbyreason of the loi-passes '18 andto 'regulate the action, ofthe pistons 3' and needle valves Q21 are adjusted as the occasion may require, and the liquid which passes intoltheoil Chamber .19 is allowed to return to its original sourcetlirough the bipass openings 20,;the valves 17 are also providedfor arquiclrreturn of theliquid thatmayerm-in therecess 29 of the; pistons 3. Thearms 12V areplaced at the upper por-k tionofthe device to help eliminateseepage.-

-Ido notlvvish to connemyself to the spe-1 cie eonstruct-ion herein set forth,V and it is obvious :that I lmay change the Vconstruction tossine extent and I claim. all such changes into which said members extend, said cylini der casing being provided with passages from the recesses in said pistons intorsaid cham-l bers, mechanical means connecting said vehicle supporting members with said pistons, said recesses and chambers forming akreservoir for liquid, and said pistons having means therein for permitting the passage of compressed Aliquid from said cylinder into said reservoir.

2. In a combination spring and hydraulic vehicle shoclr absorber, a cylinder. casing,pis tons within said .cylinder casing havingl a spring tensioned therebetween, said pistons having'annular recesses, vehicle supporting members, chambers in said shock absorber intocwhichsaid members extend, said cylinderV casing being provided with passages vfrom the recesses in said pistons into said chambers, mechanical means connecting said vehicle supporting-members with said pistons, said recesses and chambers forming va reservoii1 for liquid, and said pistons havinof means therein Jfor permitting the passage o compressed liquid from said cylinder into saidlreservoir, said means comprising ball check valves in said pistons. Y

8. Ina combination spring and hydraulic vehicle shock absorber, a cylinder casing, pistons within said cylinder casing having ya spring tensioned therebetween, said pistons having annular recesses, vehicle supporting Vmembers, chambers yin said shock absorber into whichsaid ymembers extend, said ,cylinder casingvbeing provided 'with passages from vthe recesses in said pistons into said chambers, mechanical means connecting said Y vehicle supporting members with vsaid pistons, said recesses and chambers forming a c reservoir Jfor liquid, and said pistons having means therein for permitting the passage of compressed liquid from said cylinder into said reservoirfsaid means comprising ball v check valves in said pistons and by-passes ex-V tending throughv said pistons'.

' 4. Ina combination spring and hydraulic vehicle shock absorber, a cylindercasing, pistonsv within said' cylinder casing' having 'a spring tensioned therebetweemsaid pistons having annular recesses, vehicle supporting members, chambers in said shock absorber into which said members extend, said cylinder casing being provided with passages from the recesses in said pistons into said chambers, mechanical means connecting said vehicle supporting members with said pistons, said recesses and chambers forming a reservoir Jfor liquid, and said pistons having meansV therein vfor permitting the passage of compressed liquid 'from said Acylinder into said reservoir, saidsmeans comprising ball check valves in said pistons, and said cylinder casing having adjustable valves torregue lating the quantity of compressed fluid bypassed from saidV cylinder into said reservoir.

f5. In a combination spring and hydraulic vehicle shock absorber, acylinder'casing, pistons within--said--cylinder#casing having Va members, chambers in saidshock absorber into which saidrmembers extend, said cylinder casing being provided with passages rom'the recesses infsaidpistons into said chambers, mechanical means connecting said vehicle supporting members ,'.with said pistons,rsaid recesses and chambers forming a reservoir fory liquid, and'said pistons having means thereiny for permitting thepassage of compressed liquid from said cylinder into spring tensioned therebetween, said pistons Y 'having annular recesses, vehicle supporting said reservoir,.said mechanical means comprisingpivoted levers to which said supporting members areconnected.

In testimony whereof, I a'x my signature, at the city of Cincinnati, county of Hamilton,

and State of Ohio, this 24th day'of July, 1928. I

EDWARD J. riser-inn, A 

